1123340525538 has 32 divisors (see below), whose sum is σ = 2801056896000. Its totient is φ = 291776759760.

The previous prime is 1123340525537. The next prime is 1123340525551. The reversal of 1123340525538 is 8355250433211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1123340525538.

It is not an unprimeable number, because it can be changed into a prime (1123340525537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215736038 + ... + 1215736961.

It is an arithmetic number, because the mean of its divisors is an integer number (87533028000).

Almost surely, 2^{1123340525538} is an apocalyptic number.

1123340525538 is an abundant number, since it is smaller than the sum of its proper divisors (1677716370462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123340525538 is a wasteful number, since it uses less digits than its factorization.

1123340525538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431473022.

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 1123340525538 its reverse (8355250433211), we get a palindrome (9478590958749).

The spelling of 1123340525538 in words is "one trillion, one hundred twenty-three billion, three hundred forty million, five hundred twenty-five thousand, five hundred thirty-eight".